Brake-setting mechanism.



A. W. BUBLL.

BRA-KB SETTING MECHANISM.

APPLICATION FILED MAY 3, 1912.

1,063,327, Patented June 3, 1913.

2 SHEBTSSHEET 1.

'rjwvemtoz W JQJZAYJJII 67/ I a Home A. W. BUELL.

BRAKE SETTING MECHANJSM, APPLICATION FILED Mus, 1am.

1,Q63,3Q;7, I Patented June 1913.

2 SHEETS-511E312.

itnjvrrnn s rarnsr g nrrr enrich Amritsar: BUELL, orsr. PAUL, MINNESOTA,Assielvon T MELVILLE H. o. FISHER,

- a or sit. PAUL, MINNESOTA. i

Tot17Z-tc/u nrifmay concern: I

Be it knownthat I, ALBERT \V. BUnIJL, a citizen of the United States ofAmerica, residing at St; Paul, in the county of Rain 2 seyxand State of'Minnesota, have invented new and useful Improvements inBrake-Settinp'-;Mechanisms, of which the following is a specification.This invention relates to improvements in 1G brakes and has particularapplication to an emergency brake setting mechanism for use inconjunction with air brake systems.

In carrying out the presentinvention, it is hiy -purpose to provide anemergency l ,brakesetting mechanism by means of which thebrake shoesmaybe instantaneously a'p-" plied to the wheels independently of theairi-;pres sure and the usual hand operating appliances.

201v. hlurthermore, I-aim to provide an emer-' gene-y brake settingmechanism which may be connected 'up with the cylinder levers ofthebrake-cylinder of an air brake system andvivhereby the brake shoesmay be'ap- 2 spliedito'the Wheels independently of the air :pressure andagainst the action ofthe restoring-devices and atmospheric pressure ontlie inactive side of the piston Within the respective brake cylinder,that is the sideof -3the piston opposite from that acted upon by theairpressure of the system.

It'Iis also my purpose to provide a mecli anismaot' this class which maybe applied to anyi-ivliecle'd vehicle and connected up to ;the itairribrake :system thereof without niateriallychangi'ng the parts andwhich will be simple in construction, effective in operationlvaiid cheapto install andxmaintain.

With the above and other objects in View,

9 th e invention consists in the construction,

combination and arrangement of parts here-- inafte'r set forth in; and 1alling within the scope of the claims. a

Initlie accompanying drawings; Figure 1 ils ga bottom planview ofa?wvheeledvehiclo equipped with thcupresent' invention. Fig:

2 is a Iliagrammatic view oftlie sameyand Figptliis a fragmentarysideelevation of a tiqn; i v 1 y In ,carrying my invention into practice,

the emergency brake setting mechanism forming the subject matter of thepresent invention, is connected up to one of the cylindcr levers ottheair brake mechanism,

Specification of Letters Patent. t Applicationfiled May 3, 1912. SerialNo. 694,819,

car showingla ,haodifiedform-of the invenindependently of the, airpressure.

' The emergency br'akesetting mechanism,

BR KE-SETTING MECHANISM.

Patented June 3, i913.

such cylinder lever being relatively long for this purpose and capableof operating under the action of the air pressure and the usual handoperating appliances, independ-v ently of the emergency brakesettingmechanism and nism.

Referring now to the accompanying drawings in detail, the bottom of acar or other rolling stock is indicated ata and to such bottom Withoutaitecting such mechaist'astened in'anysuitable manner the usual b *akecylinder 1 connected up in'any'suitable manner to the air pipes of anyWell known or selected formofair brake mechanism and equipped at one endwith a pair ofi. spaced parallelears 2 between which is pivotallymounted as'at 3 the usual cylinder lever & having its free end 5connected to the brake beams of the particular trucks by meansiof theusual connecting rod or the like. Mounted for reciprocation within thecylin- 'der 1 is apiston 6 equipped with a piston rod 7 "extendingbeyond the end of the cylinder opposite from the ears 2 and pivotallyconnected as at- 8 to the other cylinder lever 9 which latter has itsfree end 10 connected up to the particular brake beam of the trucksthrough the medium of any suitable connecting rod or the like,'wl1ileinterconnecting the levers 4 and 9 is the usual cylinder lever rod 11having its extremities pivoted as at '12, 12 to the respective cylinderlevers intermediate the lengthsof such levers. The piston 6 may be movedtoward the piston rod end of the cylinder to effect the application ofthe brakes by any suitable means, such, for instance, as by airpressure, and actuated inwardly'of the cylinder and against the actionof such pressure by a spring to maintain the brake shoes cylinderlevers, as the cylinder lever 9, is

extended beyond its pivotal connection with the piston rod 7 to form alever 13 provided at an appropriate point with an eye 14. adaptedt'orconnection with the hand op erating appliances of the brake mechanism'sowthat thebrakes maybe applied by hand in the presentinstance,includes a link 15 mounted for sliding movement Within suitable guideson the bottom of the vehicle and formed with an elongated slot 16through which is passed the tree extremity of the disengaged from thewheels. One of the loo lever 13, the latter when inactive normallyengaging one wall of the slot as shown in Fig. 2, and connected to oneextremity of the link member 15 is a suitable tension device as acontractile spring 17, the opposite end of thelatter being fixed to anappropriate part of the car or vehicle, suchspring normally tending toslide the link 15 and throw the lever 13 to actuate the cylinder leversto effect the application ofthe brake to the car wheels. This spring isof sufficient power to overcome the action of the restoring device andatmospheric pressure on the inactive side of the piston within the brakecylinder so that when the spring is permitted to act the piston will bedrawn toward one end of the brake cylinder and against; the action ofthe restoring device therein to apply the brakes to the wheelsindependently of the air.

In order to hold the link 15 against the action of the tension means, Imake use of a latch mechanism which in the present instance consists of:1 block 18 formed with a longitudinal slot, 19 through which is passeda metallic strip 20, and provided with a bore 21 arranged at rightangles to the slot 19 and housing a latching pin 22 equipped with ashank 23 passed through an aperture in the block contiguous the bore.This strip 20 is formed with an aperture designed to register with thebore 21 and adapted to receive the latching pin 22, and the latter isnormally held within the aperture in the strip by means of a coiledexpansion spring 24 encircling the shank '23 of the latching pinintermediate one wall of the bore and the adjacent surface of the pin,as clearly illustrated in Fig. 2. One extremity of the metallic strip 20is connected to an eye 25 fastened to the link 15, while the oppositeextremity of such latching'strip has connection with a. resetting devicethe latter being operable manually to restore the link 15 to an inactiveposition subsequent to the action of the spring 17. This resettingdevice, in the present embodiment of the invention embodies an operatinglever 26 pivoted as at 27 to an appropriate part of the car; andconnected by means of a chain 28 or other flexible element to the treeextremity of the strip 20, a spring 29 being connected at one extremityto the operating lever and having its opposite extremity fixed to asuitable part of the vehicle body and serving to normally hold theoperating lever in an inoperative position.

From the foregoing description taken in connection with the device shownin Figs. 1 and 2, the construction and mode of operation will be readilyapparent. Assuming the parts to be in the position shown in Fig.

i 2, and it is desired to apply the brakes independently of the air, thelatching pin 22 is withdrawn fr om engagement with the opening in thestrip 20 whereby the spring 17 will act upon the link 15 to slide thelatter within its guides and consequently draw the lever 13 andthcpiston in the brake cylinder against the restoring device, therebyapplying the brakcs to the wheels and bringing the vehicle to a stop. Toreset the emergency brake setting mechanism, the operating lever 26 ismoved about its pivot 27 and against the action of the spring 29 withthe eticct to 'pull. the chain 28 and draw the strip 20 through theblock 18 and against theaction of the spring 17, the latching pin 22 relntering the opening in the strip 20 when such opening registers with-thebore in the block. The release of the pin 22 preferably brought aboutfronr a part of the vehicle convenient to the motorman or operator, andfor this purpose the shank 23 of such pin is formed with an eye 30 towhich isconnectcd one extremity of a cord, cable or the-like 31terminating in branch cables 32, 32 each trained over aguide sheavejonrnalcd to :1V suitable part of the car body, the lrceextremitirs ofthe cables 32, 32 terminating at the platforms from which the motormanhas control of the car ,or vehicld and having such extremities connectedto suitable operating levers or rods so thatwhen a pull is exerted upon9 the chains, the latching pin will be w1thdrawn, as previouslydescribed.

,Refcrring now to the modified form of the invention shown in Fig. 3,the emergency brake setting mechanism is connected up to the fender ofthe car and capable of actuation therefrom so that when such tendermeets an obstruction, the brakes will be instantaneously applied. As thefender at each end of the car is connected to the emergency brakesetting mechanism in a manner identical to that of the other fender, itis thought that a dcscription and showing of one will slillicc for both.The tender is indicated at 3t and is swiveled or otherwise secured tothe car body and held in an elevatcd position by means ofa contractilespring 35, and rigidly connected to the end of each fender immediatelybelow the bottom of the car, is an arm 36 connected as at 37 to therespective chain 32. Thus, when the fender contacts with; an object suchfender will be depressed with the ctl'ect that the cord or cable 32 isactuated to withdraw the latching pin from engagement with the strip 20whereby the emergency brake Setting mechanism will actuate as previouslydescribed.

\Vhile I have herein shown and described certain particular embodimentsof my invention by way of illustration, it is to be understood that I.do not limit or confine my self to the exact details of constructionherein described and delincatedpas modification and variation may bemade within the scope of the claims and Without departing from thespirit of the invention.

I claim:

1. The combination With a brake cylinder, cylinder levers and cylinderlever rods, an emergency brake setting mechanism, a connection betweensaid mechanism and one of the cylinder levers, latching means normallyholding said mechanism inoperative and adapted to render the sameoperative, and means associated with said latching means and operable torelieve the brake setting mechanism of the influence of the latchingmeans.

2. The combination with a brake cylinder, cylinder levers and cylinderlever rods, of an emergency brake setting mechanism, a connectionbetween said mechanism and one of the cylinder levers, and latchingmeans normally holding said mechanism inactive and adapted to render thesame operative, said' latching means comprising a block, a stripslidably disposed Within the block and connected to the brake settingmechanism, a latching pin Within the block and adapted to engage tiestrip, and means for disengaging the latching pin from the strip.

The combination with a brake cylinder, cylinder levers and cylinderlever rods, of

an emergency brake setting mechanism, a

connection between said mechanism and one of the cylinder levers,latching means normally holding said mechanism inactive and adapted torender the same operative, and

a resetting device for said mechanism, said resetting device including alever manually operable to restore the brake setting mechanismsubsequent to'the release of the latching means, and a connectionbetween said lever and latching means.

4. The combination with a brake cylinder,

cylinder levers and cylinder lever rods, of an emergency brake settingmechanism, a

connection between said mechanism and one of the cylinder levers,latching means nor-. r

